Scattering of High-Energy Electrons and the Method of Nuclear Recoil

Hofstadter, R.; Fechter, H. R.; McIntyre, John A.

doi:10.1103/physrev.91.422

Cited by 56 publications

(12 citation statements)

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“…An early report of work done at the Stanford University High Energy Physics Laboratory at energies larger than 100 MeV, was reported by Hofstadter, Fechter and McIntyre [Hof53a], who detected deviations from scattering by a point charge in carbon and gold. The first review paper of the field, written by Hofstadter in 1956 [Hof56] included measurement of the proton FF, up to a momentum transfer squared of q 2 = 13.3 fm −2 , or 0.52 GeV 2 .…”

Section: Nucleon Form Factors From En Cross Sectionsmentioning

confidence: 99%

Nucleon electromagnetic form factors

Perdrisat

Punjabi

Vanderhaeghen

2007

Progress in Particle and Nuclear Physics

475

583

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There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has been greatly improved by performing double polarization experiments, in comparison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at MIT-Bates, MAMI, and JLab. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed, including the recent progress in the determination of the valence quark generalized parton distributions of the nucleon, as well as the steady rate of improvements made in the lattice QCD calculations.

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Section: Nucleon Form Factors From En Cross Sectionsmentioning

confidence: 99%

Nucleon electromagnetic form factors

Perdrisat

Punjabi

Vanderhaeghen

2007

Progress in Particle and Nuclear Physics

475

583

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“…The form 1014 factor F takes account of the interference between scattered wavelets arising from different parts of the same, finite nucleus and therefore is responsible for diffraction effects observed in the angular distribution. The quantity F is actually given by F-p Jf (r) (sin qr) rdr (5) 0 in the event that the nucleus exhibits spherical symmetry. The quantity p(r) is the electric charge density function, in which r represents the distance from the center of the nucleus to the volume element where p is measured.…”

Section: Methods Of High-energy Electron Scattering Adtermentioning

confidence: 99%

Structure of Nuclei and Nucleons

Hofstadter

1962

Science

Self Cite

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In concluding this discussion it may be appropriate to return to the theme introduced earlier and raise the question once again of the deeper, and possibly philosophical, meaning of the term "elementary" particle. As we have seen, the proton and neutron, which were once thought to be elementary particles, are now seen to be highly complex bodies. It is almost certain that physicists will subsequently investigate the constituent parts of the proton and neutron-the mesons of one sort or another. What will happen from that point on? One can only guess at future problems and future progress, but my personal conviction is that the search for ever-smaller and ever-more-fundamental particles will go on as long as man retains the curiosity he has always demonstrated (29).

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“…The study of nuclei with electromagnetic probes has a long, distinguished history in nuclear physics including the Nobel Prize awarded to Robert Hofstadter in 1961 [1]. With the completion of the 12 GeV Upgrade at the Thomas Jefferson National Accelerator Facility (JLab) in Newport News, VA, USA we now stand on the doorstep of a new chapter in our understanding of atomic nuclei [2].…”

Section: Introductionmentioning

confidence: 99%

Future Measurements of the Nucleon Elastic Electromagnetic Form Factors at Jefferson Lab

Gilfoyle

2018

EPJ Web of Conferences

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Abstract. The elastic, electromagnetic form factors are fundamental observables that describe the internal structure of protons, neutrons, and atomic nuclei. Jefferson Lab in the United States has completed the 12 GeV Upgrade that will open new opportunities to study the form factors. A campaign to measure all four nucleon form factors (electric and magnetic ones for both proton and neutron) has been approved consisting of seven experiments in Halls A, B, and C. The increased energy of the electron beam will extend the range of precision measurements to higher Q 2 for all four form factors together. This combination of measurements will allow for the decomposition of the results into their quark components and guide the development of a QCD-based understanding of nuclei in the non-perturbative regime. I will present more details on the 12 GeV Upgrade, the methods used to measure the form factors, and what we may learn.

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Scattering of High-Energy Electrons and the Method of Nuclear Recoil

Cited by 56 publications

References 1 publication

Nucleon electromagnetic form factors

Nucleon electromagnetic form factors

Structure of Nuclei and Nucleons

Future Measurements of the Nucleon Elastic Electromagnetic Form Factors at Jefferson Lab

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